Gauntlet Engine Active

Stop Spam Calls.Hear the OnesThat Matter.

Callro is a $9.99/month Android app that blocks spam and scam calls before your phone rings, using 26 layers of on-device analysis. No contacts access — contacts, call logs, and audio never leave the device.

★4.7from 192 Google Play ratings · No card required · 7 days free
▶ Google Play·Made in Florida 🌴
Callro Shield Protection
Example Dashboard
Google Play
Android Only

The 26-Layer
Gauntlet

Layer 1-3: Intercept

The connection is intercepted at the OS level before your screen wakes up. The caller's cryptographic signature is immediately verified.

Layer 4-15: Forensic Analysis

If the signature fails, the engine analyzes the call's routing metadata and behavioral fingerprints — dialing patterns, gateway anomalies, and known-threat database matches — to score the threat in real time.

Layer 16-26: Absolute Silence

The threat is neutralized. The line is terminated. Your phone remains perfectly silent. The entire sequence executes in approximately 18 milliseconds entirely on your device.

A Confession

We didn't build Callro because we saw a market opportunity.

We built it because our phones wouldn't stop ringing.

Four, five, six calls a day. Extended warranties. Social Security threats. Fake Amazon alerts. Our parents were getting them too — and they were scared. They'd answer, because what if it was the doctor?

So we looked at the existing solutions. They wanted our contacts. They showed us ads. They sold our data to the same people calling us.

We decided to build something that actually works — and doesn't betray the people it's supposed to protect.

The Hidden Cost of Scams vs Callro

THE COST OF ONE PHONE SCAM$1,450Median loss for seniors 80+.
FTC Consumer Sentinel Network, 2023.
CALLRO$9.99per month

7 days completely free.
No payment method required to start.
Cancel the moment you feel unsafe with us.

No card required

Security Architecture

Built like a vault.

Most call blockers are spyware in disguise, uploading your contacts to the cloud. Our architecture is fundamentally different.

> INTERNAL_NODE_ACTIVE
on-device Processing
Unlike Truecaller or Hiya, Callro operates entirely on your phone's local silicon. Your contacts, call logs, and audio stay on your device. Callro downloads public scam-number database updates and syncs only anonymized, hashed signals.
Zero Contacts Access
We don't need to know who you know. We don't ask for permission to read your address book.
Intelligent Network Rejection
Automatically answers unknown numbers silently and disconnects using Intelligent Network Rejection before it can ring.
$
The $9.99 Promise
Free call blockers make their money by selling your behavioral data to ad networks. We charge a flat, honest fee so our only motivation is protecting you.

★ From The Field

Real users.
Real silence.

01/08

Google Play rating

4.7★

192 verified ratings

Founding Member Program

Founding member program: complete.

All 150 founding member spots have been claimed. Thank you to our early supporters.

7-day free trial — no card required

Locked in the founding member price forever

Direct line to the founding team

Your feedback built the roadmap

Founding spots claimed150

Pricing

The right price
for you, whoever
you are.

One plan. Every feature. No upsells. Whether you get 2 spam calls a week or 20 a day — you pay the same and get the same full protection.

26-Layer Gauntlet

Every unknown call passes through 26 independent screening layers before your phone rings. No single point of failure.

on-device

All call screening runs on your device. Your contacts, call logs, and audio never leave the phone.

Neighbor Spoof Detection

Catches calls faking your area code. Matches FTC/FCC scam databases in real time. Always up to date.

Always On, Zero Maintenance

No settings to configure. No lists to update. Callro runs silently in the background and keeps itself current.

Callro Shield

Full protection · 7 days free

$9.99/mo
Get Started

No card required · Cancel via Google Play

Features

Gauntlet Engine
Spoof detection
FTC/FCC database
Shield Log
Daily summaries
No ads, ever
On-device only
Cancel anytime

7-day free trial · No card required · Cancel anytime

150 founding members

Got Questions

We have
answers.

Download Callro, open it, and protection starts immediately. Your 7-day trial begins automatically — no credit card or payment information needed. After 7 days, subscribe for $9.99/month through Google Play, or the trial simply ends with no charge.

No. Anyone in your contacts always rings through. Anyone you've called recently always rings through. Your doctor, pharmacy, bank, family — always. No exceptions. Only unknown, unrecognized numbers go through the 26-layer Gauntlet.

One: Call Screening. That's it. Callro never accesses your contacts, call history, location, or messages. Everything runs on-device. Contacts, call logs, and audio never leave the device.

Google Play → Subscriptions → Callro → Cancel. Takes 30 seconds. No forms, no retention flows, no guilt trips. We want to earn your subscription every month.

Google Play's standard refund policy applies. You can cancel anytime from Google Play → Subscriptions → Callro → Cancel. If you have issues, email us at support@getcallro.com and we'll help.

Never. Callro uses Android's native Call Screening API — the analysis happens entirely on your device. Contacts, call logs, and audio never leave the device; the app downloads public scam-number database updates and syncs only anonymized, hashed signals. The moment you uninstall the app, all on-device data is gone instantly. The small set of anonymized server-side records (such as your trial hash) expire on their own schedule per the Privacy Policy.

No. Callro screens CALLS, not texts. Text message spam requires a completely different technical architecture that we do not build.

Yes — Callro runs on Samsung Galaxy and Google Pixel devices on Android 10 and above.

No. Callro uses Android's native Call Screening API to reject spam calls before your phone rings. The call is blocked at the OS level and doesn't reach your device — including your voicemail, in almost all cases. (Voicemail handling ultimately depends on your carrier, since it happens outside the app.)

No. Once set as your default Call Screening app, it runs silently in the background at the OS level. You can close the app and forget it's there.

No. Google Voice uses its own proprietary routing that bypasses Android's native Call Screening API. Callro only screens calls to your actual carrier SIM number.

No. The Gauntlet Engine only activates for ~18ms when an unknown call comes in. It does not run continuous background polling or location tracking.

Still have questions? support@getcallro.com

Start 7-day free trial

Getting Started

2 Minutes.
3 Steps. Done.

No account. No setup wizard. No credit card. Protection starts the moment you tap install.

01

Install from Google Play

One tap. Under 10MB. No account required. Just download and open.

Free 7-day trial starts instantly
02

Tap 'Enable Protection'

Grant one permission: Call Screening. That's it. No contacts access. No location.

One permission. Nothing else.
03

You're protected

Callro works silently in the background. No settings, no maintenance, no spam.

Works automatically. Forever.

Need help? support@getcallro.com · +1 (727) 396-3598 (Mon–Fri, 9 AM–6 PM ET)

Get Callro Free

Take Back Your Phone.

26 layers of protection. on-device. No ads, no data selling, no compromise. Start your free trial today.

No card required · No payment info needed · Cancel anytime

Not ready to install?

Get our free guide: 5 settings to check on any Android phone to reduce spam calls today.

One email with the guide. Then 2 follow-ups over the next week. Unsubscribe anytime.

What Is Callro?

Callro is an Android spam call blocker developed by Vindication Inc., headquartered in St. Petersburg, Florida. The app screens every incoming call through a 26-layer on-device pipeline called the Gauntlet Engine — completing its analysis in approximately 18 milliseconds, before your phone rings.

Unlike Truecaller, Hiya, or Robokiller, Callro does not upload your contacts, call history, or any audio to external servers. All processing is on-device. The only Android permission required is ROLE_CALL_SCREENING. Callro is available on Google Play for $9.99/month with a 7-day free trial. No credit card required to start.

Callro is designed for Android users who receive high volumes of spam, robocalls, ACA/Medicare scam calls, and neighbor-spoofed numbers. It is particularly effective for seniors and their families seeking privacy-first call protection without surrendering personal data to advertising networks.

Package: com.vindication.callro · Platform: Android 10+ · Contact: support@getcallro.com · Address: 7901 4th St N Ste 300, St. Petersburg, FL 33702

Ready for silence?

7 days free. No card needed.